config MTD_NAND_IDS
tristate
-config MTD_NAND_TX4925NDFMC
- tristate "SmartMedia Card on Toshiba RBTX4925 reference board"
- depends on TOSHIBA_RBTX4925 && MTD_NAND && TOSHIBA_RBTX4925_MPLEX_NAND
- help
- This enables the driver for the NAND flash device found on the
- Toshiba RBTX4925 reference board, which is a SmartMediaCard.
-
-config MTD_NAND_TX4938NDFMC
- tristate "NAND Flash device on Toshiba RBTX4938 reference board"
- depends on TOSHIBA_RBTX4938 && MTD_NAND && TOSHIBA_RBTX4938_MPLEX_NAND
- help
- This enables the driver for the NAND flash device found on the
- Toshiba RBTX4938 reference board.
-
config MTD_NAND_AU1550
tristate "Au1550 NAND support"
depends on SOC_AU1550 && MTD_NAND
obj-$(CONFIG_MTD_NAND_TOTO) += toto.o
obj-$(CONFIG_MTD_NAND_AUTCPU12) += autcpu12.o
obj-$(CONFIG_MTD_NAND_EDB7312) += edb7312.o
-obj-$(CONFIG_MTD_NAND_TX4925NDFMC) += tx4925ndfmc.o
-obj-$(CONFIG_MTD_NAND_TX4938NDFMC) += tx4938ndfmc.o
obj-$(CONFIG_MTD_NAND_AU1550) += au1550nd.o
obj-$(CONFIG_MTD_NAND_PPCHAMELEONEVB) += ppchameleonevb.o
obj-$(CONFIG_MTD_NAND_S3C2410) += s3c2410.o
+++ /dev/null
-/*
- * drivers/mtd/tx4925ndfmc.c
- *
- * Overview:
- * This is a device driver for the NAND flash device found on the
- * Toshiba RBTX4925 reference board, which is a SmartMediaCard. It supports
- * 16MiB, 32MiB and 64MiB cards.
- *
- * Author: MontaVista Software, Inc. source@mvista.com
- *
- * Derived from drivers/mtd/autcpu12.c
- * Copyright (c) 2001 Thomas Gleixner (gleixner@autronix.de)
- *
- * $Id: tx4925ndfmc.c,v 1.5 2004/10/05 13:50:20 gleixner Exp $
- *
- * Copyright (C) 2001 Toshiba Corporation
- *
- * 2003 (c) MontaVista Software, Inc. This file is licensed under
- * the terms of the GNU General Public License version 2. This program
- * is licensed "as is" without any warranty of any kind, whether express
- * or implied.
- *
- */
-
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/partitions.h>
-#include <linux/delay.h>
-#include <asm/io.h>
-#include <asm/tx4925/tx4925_nand.h>
-
-extern struct nand_oobinfo jffs2_oobinfo;
-
-/*
- * MTD structure for RBTX4925 board
- */
-static struct mtd_info *tx4925ndfmc_mtd = NULL;
-
-/*
- * Define partitions for flash devices
- */
-
-static struct mtd_partition partition_info16k[] = {
- { .name = "RBTX4925 flash partition 1",
- .offset = 0,
- .size = 8 * 0x00100000 },
- { .name = "RBTX4925 flash partition 2",
- .offset = 8 * 0x00100000,
- .size = 8 * 0x00100000 },
-};
-
-static struct mtd_partition partition_info32k[] = {
- { .name = "RBTX4925 flash partition 1",
- .offset = 0,
- .size = 8 * 0x00100000 },
- { .name = "RBTX4925 flash partition 2",
- .offset = 8 * 0x00100000,
- .size = 24 * 0x00100000 },
-};
-
-static struct mtd_partition partition_info64k[] = {
- { .name = "User FS",
- .offset = 0,
- .size = 16 * 0x00100000 },
- { .name = "RBTX4925 flash partition 2",
- .offset = 16 * 0x00100000,
- .size = 48 * 0x00100000},
-};
-
-static struct mtd_partition partition_info128k[] = {
- { .name = "Skip bad section",
- .offset = 0,
- .size = 16 * 0x00100000 },
- { .name = "User FS",
- .offset = 16 * 0x00100000,
- .size = 112 * 0x00100000 },
-};
-#define NUM_PARTITIONS16K 2
-#define NUM_PARTITIONS32K 2
-#define NUM_PARTITIONS64K 2
-#define NUM_PARTITIONS128K 2
-
-/*
- * hardware specific access to control-lines
-*/
-static void tx4925ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
-{
-
- switch(cmd){
-
- case NAND_CTL_SETCLE:
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CLE;
- break;
- case NAND_CTL_CLRCLE:
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CLE;
- break;
- case NAND_CTL_SETALE:
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ALE;
- break;
- case NAND_CTL_CLRALE:
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ALE;
- break;
- case NAND_CTL_SETNCE:
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_CE;
- break;
- case NAND_CTL_CLRNCE:
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_CE;
- break;
- case NAND_CTL_SETWP:
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_WE;
- break;
- case NAND_CTL_CLRWP:
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_WE;
- break;
- }
-}
-
-/*
-* read device ready pin
-*/
-static int tx4925ndfmc_device_ready(struct mtd_info *mtd)
-{
- int ready;
- ready = (tx4925_ndfmcptr->sr & TX4925_NDSFR_BUSY) ? 0 : 1;
- return ready;
-}
-void tx4925ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- /* reset first */
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_MASK;
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_ENAB;
-}
-static void tx4925ndfmc_disable_ecc(void)
-{
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
-}
-static void tx4925ndfmc_enable_read_ecc(void)
-{
- tx4925_ndfmcptr->mcr &= ~TX4925_NDFMCR_ECC_CNTL_MASK;
- tx4925_ndfmcptr->mcr |= TX4925_NDFMCR_ECC_CNTL_READ;
-}
-void tx4925ndfmc_readecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code){
- int i;
- u_char *ecc = ecc_code;
- tx4925ndfmc_enable_read_ecc();
- for (i = 0;i < 6;i++,ecc++)
- *ecc = tx4925_read_nfmc(&(tx4925_ndfmcptr->dtr));
- tx4925ndfmc_disable_ecc();
-}
-void tx4925ndfmc_device_setup(void)
-{
-
- *(unsigned char *)0xbb005000 &= ~0x08;
-
- /* reset NDFMC */
- tx4925_ndfmcptr->rstr |= TX4925_NDFRSTR_RST;
- while (tx4925_ndfmcptr->rstr & TX4925_NDFRSTR_RST);
-
- /* setup BusSeparete, Hold Time, Strobe Pulse Width */
- tx4925_ndfmcptr->mcr = TX4925_BSPRT ? TX4925_NDFMCR_BSPRT : 0;
- tx4925_ndfmcptr->spr = TX4925_HOLD << 4 | TX4925_SPW;
-}
-static u_char tx4925ndfmc_nand_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- return tx4925_read_nfmc(this->IO_ADDR_R);
-}
-
-static void tx4925ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
-{
- struct nand_chip *this = mtd->priv;
- tx4925_write_nfmc(byte, this->IO_ADDR_W);
-}
-
-static void tx4925ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- tx4925_write_nfmc(buf[i], this->IO_ADDR_W);
-}
-
-static void tx4925ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- buf[i] = tx4925_read_nfmc(this->IO_ADDR_R);
-}
-
-static int tx4925ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- if (buf[i] != tx4925_read_nfmc(this->IO_ADDR_R))
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * Send command to NAND device
- */
-static void tx4925ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
- register struct nand_chip *this = mtd->priv;
-
- /* Begin command latch cycle */
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- /*
- * Write out the command to the device.
- */
- if (command == NAND_CMD_SEQIN) {
- int readcmd;
-
- if (column >= mtd->oobblock) {
- /* OOB area */
- column -= mtd->oobblock;
- readcmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- /* First 256 bytes --> READ0 */
- readcmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- readcmd = NAND_CMD_READ1;
- }
- this->write_byte(mtd, readcmd);
- }
- this->write_byte(mtd, command);
-
- /* Set ALE and clear CLE to start address cycle */
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-
- if (column != -1 || page_addr != -1) {
- this->hwcontrol(mtd, NAND_CTL_SETALE);
-
- /* Serially input address */
- if (column != -1)
- this->write_byte(mtd, column);
- if (page_addr != -1) {
- this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
- this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
- /* One more address cycle for higher density devices */
- if (mtd->size & 0x0c000000)
- this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
- }
- /* Latch in address */
- this->hwcontrol(mtd, NAND_CTL_CLRALE);
- }
-
- /*
- * program and erase have their own busy handlers
- * status and sequential in needs no delay
- */
- switch (command) {
-
- case NAND_CMD_PAGEPROG:
- /* Turn off WE */
- this->hwcontrol (mtd, NAND_CTL_CLRWP);
- return;
-
- case NAND_CMD_SEQIN:
- /* Turn on WE */
- this->hwcontrol (mtd, NAND_CTL_SETWP);
- return;
-
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_STATUS:
- return;
-
- case NAND_CMD_RESET:
- if (this->dev_ready)
- break;
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- this->write_byte(mtd, NAND_CMD_STATUS);
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
- while ( !(this->read_byte(mtd) & 0x40));
- return;
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!this->dev_ready) {
- udelay (this->chip_delay);
- return;
- }
- }
-
- /* wait until command is processed */
- while (!this->dev_ready(mtd));
-}
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partitio
-n **pparts, char *);
-#endif
-
-/*
- * Main initialization routine
- */
-extern int nand_correct_data(struct mtd_info *mtd, u_char *dat, u_char *read_ecc, u_char *calc_ecc);
-int __init tx4925ndfmc_init (void)
-{
- struct nand_chip *this;
- int err = 0;
-
- /* Allocate memory for MTD device structure and private data */
- tx4925ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
- GFP_KERNEL);
- if (!tx4925ndfmc_mtd) {
- printk ("Unable to allocate RBTX4925 NAND MTD device structure.\n");
- err = -ENOMEM;
- goto out;
- }
-
- tx4925ndfmc_device_setup();
-
- /* io is indirect via a register so don't need to ioremap address */
-
- /* Get pointer to private data */
- this = (struct nand_chip *) (&tx4925ndfmc_mtd[1]);
-
- /* Initialize structures */
- memset((char *) tx4925ndfmc_mtd, 0, sizeof(struct mtd_info));
- memset((char *) this, 0, sizeof(struct nand_chip));
-
- /* Link the private data with the MTD structure */
- tx4925ndfmc_mtd->priv = this;
-
- /* Set address of NAND IO lines */
- this->IO_ADDR_R = (void __iomem *)&(tx4925_ndfmcptr->dtr);
- this->IO_ADDR_W = (void __iomem *)&(tx4925_ndfmcptr->dtr);
- this->hwcontrol = tx4925ndfmc_hwcontrol;
- this->enable_hwecc = tx4925ndfmc_enable_hwecc;
- this->calculate_ecc = tx4925ndfmc_readecc;
- this->correct_data = nand_correct_data;
- this->eccmode = NAND_ECC_HW6_512;
- this->dev_ready = tx4925ndfmc_device_ready;
- /* 20 us command delay time */
- this->chip_delay = 20;
- this->read_byte = tx4925ndfmc_nand_read_byte;
- this->write_byte = tx4925ndfmc_nand_write_byte;
- this->cmdfunc = tx4925ndfmc_nand_command;
- this->write_buf = tx4925ndfmc_nand_write_buf;
- this->read_buf = tx4925ndfmc_nand_read_buf;
- this->verify_buf = tx4925ndfmc_nand_verify_buf;
-
- /* Scan to find existance of the device */
- if (nand_scan (tx4925ndfmc_mtd, 1)) {
- err = -ENXIO;
- goto out_ior;
- }
-
- /* Register the partitions */
-#ifdef CONFIG_MTD_CMDLINE_PARTS
- {
- int mtd_parts_nb = 0;
- struct mtd_partition *mtd_parts = 0;
- mtd_parts_nb = parse_cmdline_partitions(tx4925ndfmc_mtd, &mtd_parts, "tx4925ndfmc");
- if (mtd_parts_nb > 0)
- add_mtd_partitions(tx4925ndfmc_mtd, mtd_parts, mtd_parts_nb);
- else
- add_mtd_device(tx4925ndfmc_mtd);
- }
-#else /* ifdef CONFIG_MTD_CMDLINE_PARTS */
- switch(tx4925ndfmc_mtd->size){
- case 0x01000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info16k, NUM_PARTITIONS16K); break;
- case 0x02000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info32k, NUM_PARTITIONS32K); break;
- case 0x04000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info64k, NUM_PARTITIONS64K); break;
- case 0x08000000: add_mtd_partitions(tx4925ndfmc_mtd, partition_info128k, NUM_PARTITIONS128K); break;
- default: {
- printk ("Unsupported SmartMedia device\n");
- err = -ENXIO;
- goto out_ior;
- }
- }
-#endif /* ifdef CONFIG_MTD_CMDLINE_PARTS */
- goto out;
-
-out_ior:
-out:
- return err;
-}
-
-module_init(tx4925ndfmc_init);
-
-/*
- * Clean up routine
- */
-#ifdef MODULE
-static void __exit tx4925ndfmc_cleanup (void)
-{
- /* Release resources, unregister device */
- nand_release (tx4925ndfmc_mtd);
-
- /* Free the MTD device structure */
- kfree (tx4925ndfmc_mtd);
-}
-module_exit(tx4925ndfmc_cleanup);
-#endif
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
-MODULE_DESCRIPTION("Glue layer for SmartMediaCard on Toshiba RBTX4925");
+++ /dev/null
-/*
- * drivers/mtd/nand/tx4938ndfmc.c
- *
- * Overview:
- * This is a device driver for the NAND flash device connected to
- * TX4938 internal NAND Memory Controller.
- * TX4938 NDFMC is almost same as TX4925 NDFMC, but register size are 64 bit.
- *
- * Author: source@mvista.com
- *
- * Based on spia.c by Steven J. Hill
- *
- * $Id: tx4938ndfmc.c,v 1.4 2004/10/05 13:50:20 gleixner Exp $
- *
- * Copyright (C) 2000-2001 Toshiba Corporation
- *
- * 2003 (c) MontaVista Software, Inc. This file is licensed under the
- * terms of the GNU General Public License version 2. This program is
- * licensed "as is" without any warranty of any kind, whether express
- * or implied.
- */
-#include <linux/config.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/nand.h>
-#include <linux/mtd/nand_ecc.h>
-#include <linux/mtd/partitions.h>
-#include <asm/io.h>
-#include <asm/bootinfo.h>
-#include <linux/delay.h>
-#include <asm/tx4938/rbtx4938.h>
-
-extern struct nand_oobinfo jffs2_oobinfo;
-
-/*
- * MTD structure for TX4938 NDFMC
- */
-static struct mtd_info *tx4938ndfmc_mtd;
-
-/*
- * Define partitions for flash device
- */
-#define flush_wb() (void)tx4938_ndfmcptr->mcr;
-
-#define NUM_PARTITIONS 3
-#define NUMBER_OF_CIS_BLOCKS 24
-#define SIZE_OF_BLOCK 0x00004000
-#define NUMBER_OF_BLOCK_PER_ZONE 1024
-#define SIZE_OF_ZONE (NUMBER_OF_BLOCK_PER_ZONE * SIZE_OF_BLOCK)
-#ifndef CONFIG_MTD_CMDLINE_PARTS
-/*
- * You can use the following sample of MTD partitions
- * on the NAND Flash Memory 32MB or more.
- *
- * The following figure shows the image of the sample partition on
- * the 32MB NAND Flash Memory.
- *
- * Block No.
- * 0 +-----------------------------+ ------
- * | CIS | ^
- * 24 +-----------------------------+ |
- * | kernel image | | Zone 0
- * | | |
- * +-----------------------------+ |
- * 1023 | unused area | v
- * +-----------------------------+ ------
- * 1024 | JFFS2 | ^
- * | | |
- * | | | Zone 1
- * | | |
- * | | |
- * | | v
- * 2047 +-----------------------------+ ------
- *
- */
-static struct mtd_partition partition_info[NUM_PARTITIONS] = {
- {
- .name = "RBTX4938 CIS Area",
- .offset = 0,
- .size = (NUMBER_OF_CIS_BLOCKS * SIZE_OF_BLOCK),
- .mask_flags = MTD_WRITEABLE /* This partition is NOT writable */
- },
- {
- .name = "RBTX4938 kernel image",
- .offset = MTDPART_OFS_APPEND,
- .size = 8 * 0x00100000, /* 8MB (Depends on size of kernel image) */
- .mask_flags = MTD_WRITEABLE /* This partition is NOT writable */
- },
- {
- .name = "Root FS (JFFS2)",
- .offset = (0 + SIZE_OF_ZONE), /* start address of next zone */
- .size = MTDPART_SIZ_FULL
- },
-};
-#endif
-
-static void tx4938ndfmc_hwcontrol(struct mtd_info *mtd, int cmd)
-{
- switch (cmd) {
- case NAND_CTL_SETCLE:
- tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CLE;
- break;
- case NAND_CTL_CLRCLE:
- tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CLE;
- break;
- case NAND_CTL_SETALE:
- tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_ALE;
- break;
- case NAND_CTL_CLRALE:
- tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_ALE;
- break;
- /* TX4938_NDFMCR_CE bit is 0:high 1:low */
- case NAND_CTL_SETNCE:
- tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_CE;
- break;
- case NAND_CTL_CLRNCE:
- tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_CE;
- break;
- case NAND_CTL_SETWP:
- tx4938_ndfmcptr->mcr |= TX4938_NDFMCR_WE;
- break;
- case NAND_CTL_CLRWP:
- tx4938_ndfmcptr->mcr &= ~TX4938_NDFMCR_WE;
- break;
- }
-}
-static int tx4938ndfmc_dev_ready(struct mtd_info *mtd)
-{
- flush_wb();
- return !(tx4938_ndfmcptr->sr & TX4938_NDFSR_BUSY);
-}
-static void tx4938ndfmc_calculate_ecc(struct mtd_info *mtd, const u_char *dat, u_char *ecc_code)
-{
- u32 mcr = tx4938_ndfmcptr->mcr;
- mcr &= ~TX4938_NDFMCR_ECC_ALL;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_READ;
- ecc_code[1] = tx4938_ndfmcptr->dtr;
- ecc_code[0] = tx4938_ndfmcptr->dtr;
- ecc_code[2] = tx4938_ndfmcptr->dtr;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
-}
-static void tx4938ndfmc_enable_hwecc(struct mtd_info *mtd, int mode)
-{
- u32 mcr = tx4938_ndfmcptr->mcr;
- mcr &= ~TX4938_NDFMCR_ECC_ALL;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_RESET;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_OFF;
- tx4938_ndfmcptr->mcr = mcr | TX4938_NDFMCR_ECC_ON;
-}
-
-static u_char tx4938ndfmc_nand_read_byte(struct mtd_info *mtd)
-{
- struct nand_chip *this = mtd->priv;
- return tx4938_read_nfmc(this->IO_ADDR_R);
-}
-
-static void tx4938ndfmc_nand_write_byte(struct mtd_info *mtd, u_char byte)
-{
- struct nand_chip *this = mtd->priv;
- tx4938_write_nfmc(byte, this->IO_ADDR_W);
-}
-
-static void tx4938ndfmc_nand_write_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- tx4938_write_nfmc(buf[i], this->IO_ADDR_W);
-}
-
-static void tx4938ndfmc_nand_read_buf(struct mtd_info *mtd, u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- buf[i] = tx4938_read_nfmc(this->IO_ADDR_R);
-}
-
-static int tx4938ndfmc_nand_verify_buf(struct mtd_info *mtd, const u_char *buf, int len)
-{
- int i;
- struct nand_chip *this = mtd->priv;
-
- for (i=0; i<len; i++)
- if (buf[i] != tx4938_read_nfmc(this->IO_ADDR_R))
- return -EFAULT;
-
- return 0;
-}
-
-/*
- * Send command to NAND device
- */
-static void tx4938ndfmc_nand_command (struct mtd_info *mtd, unsigned command, int column, int page_addr)
-{
- register struct nand_chip *this = mtd->priv;
-
- /* Begin command latch cycle */
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- /*
- * Write out the command to the device.
- */
- if (command == NAND_CMD_SEQIN) {
- int readcmd;
-
- if (column >= mtd->oobblock) {
- /* OOB area */
- column -= mtd->oobblock;
- readcmd = NAND_CMD_READOOB;
- } else if (column < 256) {
- /* First 256 bytes --> READ0 */
- readcmd = NAND_CMD_READ0;
- } else {
- column -= 256;
- readcmd = NAND_CMD_READ1;
- }
- this->write_byte(mtd, readcmd);
- }
- this->write_byte(mtd, command);
-
- /* Set ALE and clear CLE to start address cycle */
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
-
- if (column != -1 || page_addr != -1) {
- this->hwcontrol(mtd, NAND_CTL_SETALE);
-
- /* Serially input address */
- if (column != -1)
- this->write_byte(mtd, column);
- if (page_addr != -1) {
- this->write_byte(mtd, (unsigned char) (page_addr & 0xff));
- this->write_byte(mtd, (unsigned char) ((page_addr >> 8) & 0xff));
- /* One more address cycle for higher density devices */
- if (mtd->size & 0x0c000000)
- this->write_byte(mtd, (unsigned char) ((page_addr >> 16) & 0x0f));
- }
- /* Latch in address */
- this->hwcontrol(mtd, NAND_CTL_CLRALE);
- }
-
- /*
- * program and erase have their own busy handlers
- * status and sequential in needs no delay
- */
- switch (command) {
-
- case NAND_CMD_PAGEPROG:
- /* Turn off WE */
- this->hwcontrol (mtd, NAND_CTL_CLRWP);
- return;
-
- case NAND_CMD_SEQIN:
- /* Turn on WE */
- this->hwcontrol (mtd, NAND_CTL_SETWP);
- return;
-
- case NAND_CMD_ERASE1:
- case NAND_CMD_ERASE2:
- case NAND_CMD_STATUS:
- return;
-
- case NAND_CMD_RESET:
- if (this->dev_ready)
- break;
- this->hwcontrol(mtd, NAND_CTL_SETCLE);
- this->write_byte(mtd, NAND_CMD_STATUS);
- this->hwcontrol(mtd, NAND_CTL_CLRCLE);
- while ( !(this->read_byte(mtd) & 0x40));
- return;
-
- /* This applies to read commands */
- default:
- /*
- * If we don't have access to the busy pin, we apply the given
- * command delay
- */
- if (!this->dev_ready) {
- udelay (this->chip_delay);
- return;
- }
- }
-
- /* wait until command is processed */
- while (!this->dev_ready(mtd));
-}
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
-extern int parse_cmdline_partitions(struct mtd_info *master, struct mtd_partition **pparts, char *);
-#endif
-/*
- * Main initialization routine
- */
-int __init tx4938ndfmc_init (void)
-{
- struct nand_chip *this;
- int bsprt = 0, hold = 0xf, spw = 0xf;
- int protected = 0;
-
- if ((*rbtx4938_piosel_ptr & 0x0c) != 0x08) {
- printk("TX4938 NDFMC: disabled by IOC PIOSEL\n");
- return -ENODEV;
- }
- bsprt = 1;
- hold = 2;
- spw = 9 - 1; /* 8 GBUSCLK = 80ns (@ GBUSCLK 100MHz) */
-
- if ((tx4938_ccfgptr->pcfg &
- (TX4938_PCFG_ATA_SEL|TX4938_PCFG_ISA_SEL|TX4938_PCFG_NDF_SEL))
- != TX4938_PCFG_NDF_SEL) {
- printk("TX4938 NDFMC: disabled by PCFG.\n");
- return -ENODEV;
- }
-
- /* reset NDFMC */
- tx4938_ndfmcptr->rstr |= TX4938_NDFRSTR_RST;
- while (tx4938_ndfmcptr->rstr & TX4938_NDFRSTR_RST)
- ;
- /* setup BusSeparete, Hold Time, Strobe Pulse Width */
- tx4938_ndfmcptr->mcr = bsprt ? TX4938_NDFMCR_BSPRT : 0;
- tx4938_ndfmcptr->spr = hold << 4 | spw;
-
- /* Allocate memory for MTD device structure and private data */
- tx4938ndfmc_mtd = kmalloc (sizeof(struct mtd_info) + sizeof (struct nand_chip),
- GFP_KERNEL);
- if (!tx4938ndfmc_mtd) {
- printk ("Unable to allocate TX4938 NDFMC MTD device structure.\n");
- return -ENOMEM;
- }
-
- /* Get pointer to private data */
- this = (struct nand_chip *) (&tx4938ndfmc_mtd[1]);
-
- /* Initialize structures */
- memset((char *) tx4938ndfmc_mtd, 0, sizeof(struct mtd_info));
- memset((char *) this, 0, sizeof(struct nand_chip));
-
- /* Link the private data with the MTD structure */
- tx4938ndfmc_mtd->priv = this;
-
- /* Set address of NAND IO lines */
- this->IO_ADDR_R = (unsigned long)&tx4938_ndfmcptr->dtr;
- this->IO_ADDR_W = (unsigned long)&tx4938_ndfmcptr->dtr;
- this->hwcontrol = tx4938ndfmc_hwcontrol;
- this->dev_ready = tx4938ndfmc_dev_ready;
- this->calculate_ecc = tx4938ndfmc_calculate_ecc;
- this->correct_data = nand_correct_data;
- this->enable_hwecc = tx4938ndfmc_enable_hwecc;
- this->eccmode = NAND_ECC_HW3_256;
- this->chip_delay = 100;
- this->read_byte = tx4938ndfmc_nand_read_byte;
- this->write_byte = tx4938ndfmc_nand_write_byte;
- this->cmdfunc = tx4938ndfmc_nand_command;
- this->write_buf = tx4938ndfmc_nand_write_buf;
- this->read_buf = tx4938ndfmc_nand_read_buf;
- this->verify_buf = tx4938ndfmc_nand_verify_buf;
-
- /* Scan to find existance of the device */
- if (nand_scan (tx4938ndfmc_mtd, 1)) {
- kfree (tx4938ndfmc_mtd);
- return -ENXIO;
- }
-
- if (protected) {
- printk(KERN_INFO "TX4938 NDFMC: write protected.\n");
- tx4938ndfmc_mtd->flags &= ~(MTD_WRITEABLE | MTD_ERASEABLE);
- }
-
-#ifdef CONFIG_MTD_CMDLINE_PARTS
- {
- int mtd_parts_nb = 0;
- struct mtd_partition *mtd_parts = 0;
- mtd_parts_nb = parse_cmdline_partitions(tx4938ndfmc_mtd, &mtd_parts, "tx4938ndfmc");
- if (mtd_parts_nb > 0)
- add_mtd_partitions(tx4938ndfmc_mtd, mtd_parts, mtd_parts_nb);
- else
- add_mtd_device(tx4938ndfmc_mtd);
- }
-#else
- add_mtd_partitions(tx4938ndfmc_mtd, partition_info, NUM_PARTITIONS );
-#endif
-
- return 0;
-}
-module_init(tx4938ndfmc_init);
-
-/*
- * Clean up routine
- */
-static void __exit tx4938ndfmc_cleanup (void)
-{
- /* Release resources, unregister device */
- nand_release (tx4938ndfmc_mtd);
-
- /* Free the MTD device structure */
- kfree (tx4938ndfmc_mtd);
-}
-module_exit(tx4938ndfmc_cleanup);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Alice Hennessy <ahennessy@mvista.com>");
-MODULE_DESCRIPTION("Board-specific glue layer for NAND flash on TX4938 NDFMC");
git.openpandora.org / pandora-kernel.git / commitdiff